The invention provides a supported type photocatalyst. The supported type photocatalyst comprises a carrier layer, a middle layer and a catalyst layer, wherein the carrier layer is porous aluminum foil, the middle layer is a metal powder layer, and the catalyst layer is a TiO2 layer. On the other hand, the invention provides a method for preparing the supported type photocatalyst. The method comprises following steps: the aluminum foil is punched, and the porous aluminum foil is formed; metal powder slurry is applied to the surface of the carrier layer by coating, the metal powder layer is formed and subjected to primary drying, sintering and anodic oxidation, and the middle layer is formed; the porous aluminum foil coated with the middle layer is soaked in a catalyst precursor solution, taken out and then subjected to secondary drying, sintering and anodic oxidation, and the catalyst layer is formed. The supported type photocatalyst has the characteristics that the carrier has a highsurficial area, the carrier and the catalyst layer have good compatibility, charge capacity and effective superficial area of the photocatalyst can be increased, photocatalytic efficiency is improved,the service life is long and the like.